# A109153 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 22
5 94
6 450
7 2366
8 13450
9 81802
10 527826
11 3590294
12 25609782
13 190753502
14 1478339866
15 11884997478
16 98859026322
17 848881803218
18 7509881820930
19 68330806392070
20 638444805545622
21 6117166765086366
22 60028033370994386